UC Davis

Abstract

In this work, microsized zeolite NaY was synthesized using a hydrothermal method with sodium silicate as the silicone source without the organic template. The chemical composition of reaction gel was determined, preparation of the precursor and the reaction conditions for hydrothermal reaction were studied and optimized. The reason for the production of side product Na-P1 was proposed and discussed.As a promising desiccant for wide applications, the water adsorption behavior of NaY and commercial Y type zeolite was investigated. Proton solid-state NMR spectra were used to investigate the bonding in the framework for different hydration standards of zeolite samples. Neutron images were taken to explore the hydration and dehydration pattern and diffusion style of bulk zeolite samples. The dehydration of the commercial and synthesized NaY zeolites was also explored. Finally, the composites of NaY zeolite and other types of materials, glass and polyurethane were designed and investigated, and could potentially be used for reproducible water adsorption process and work as energy-conserving material.